What makes metal rust?

Answer 1

steel will rust because of ether a water and salt mixture or a water and air mixture.

for the water and salt the steel will just rust. steel will also rust in plain water.

and the science for the water and air. when steel water and oxygen come all together in contact they create Iron Oxide. that is what rust is. by the way Iron Oxide is what gives mars it's red color.

Answer 2

Salt water I also heard vinegar will do it to so maybe try salt vinegar.

Answer 3

Only metals with iron content can rust. Rusting is caused by oxidation, commonly by the presence of water.

Answer 4

A way to rust metal is by soaking/putting water in it for a frew weeks, then it starts to rust.